MALACEAE 531 
4. ARONIA Pers. 
Shrubs, with alternate simple leaves: blades petioled, finely serrate, the upper side of 
the midrib glandular, the narrow stipules early deciduous. Flowers small, in terminal com- 
pound cymes. Hypanthium urn-shaped. Sepals 5. Petals 5, white or pink, concave, 
spreading. Stamens numerous. Styles 3-5, united at the base. Ovary woolly. Pome 
small, globose or somewhat top-shaped, its carpels rather leathery. CHOKEBERRY. 
Cymes and lower surfaces of the leaf-blades woolly : fruit red or purple-black. 
Fruit broadly pyriform, bright red. 1. A. arbutifolia. 
Fruit oval or globose, purple-black. j 2. A. atropurpurea. 
Cymes and surfaces of the leaf-blades glabrous: fruit black or purplish. 3. A. nigra. 
1. Aronia arbutifdlia (L.f. ) Ell. A branching shrub, sometimes reaching a height 
of 3.5 m., but usually lower. Leaf-blades oval, oblong or obovate, obtuse or abruptly 
short-pointed at the apex, narrowed or somewhat cuneate at the base, 2.5-7.5 cm. long, 
serrulate-crenulate, glabrous above, generally densely tomentose beneath : cymes terminal, 
but at length overtopped by the young sterile shoots, compound : hypanthium and pedicels 
tomentose : corolla white or purplish tinged, 8-12 mm. broad: pome 4-6 mm. in diameter, 
broadly pyriform, and bright red when mature, long persistent. [Pyrus arbutifolia L.f.] 
In swamps and wet woods, Nova Scotia to Minnesota, Florida and Louisiana. Spring. 
2. Aronia atropurpürea Britton. A branching shrub, reaching a height of 4 m. 
Leaf-blades quite similar to those of the preceding species, tomentose beneath: cymes 
tomentose : flowers quite similar to those of A. arbutifolia: pome oval to globose, 6-10 mm. 
long, purple-black. 
In low grounds or wet soil, Nova Scotia to Florida. Spring. 
3. Aronia nigra (Willd.) Britton. A shrub resembling the preceding species, but 
larger, sometimes 5 m. tall. Leaf-blades obovate or oval, obtuse, acute, or abruptly acu- 
minate at the apex, narrowed or cuneate at the base, short-petioled, crenulate, dark green 
above, paler beneath, glabrous or nearly so on both surfaces : flowers similar to those of the 
cag species: hypanthium and pedicels nearly glabrous: fruit globose or oval, nearly 
lack, or purplish black, 6-8 mm. in diameter. 
In swamps or low woods, or in dryer soil, Nova Scotia to Ontario, Florida and Michigan. Spring 
5. AMELANCHIER Medic. 
Shrubs or trees, the branches unarmed. Leaves alternate: blades simple, petioled, 
serrate or entire. Flowers racemose or rarely solitary, white. Hypanthium campanulate, 
more or less adnate to the ovary. Sepals 5, narrow, reflexed, persistent. Petals 5. Sta- 
mens 8, inserted on the throat of the hypanthium : filaments subulate. Styles 2-5, connate, 
pubescent at the base. Ovary wholly or partly inferior, the cavities becoming twice as 
many as the styles. Ovule one in each cavity, erect. Pome small, berry-like, 4-10-celled. 
Testa of the seeds cartilaginous. JUNE-BERRY. SERVICE-BERRY. May CHERRY. 
Leaf-blades acute or acuminate at the apex; top of the ovary glabrous or nearly so. 
Leaf-blades ovate or ovate-lanceolate, rounded or cordate at the base, glabrous at maturity. 
1. A. Canadensis. 
Leaf-blades oblong, oval, ovate or obovate, rarely subcordate at the base: densely 
white-woolly beneath at least when young. 2. A. Botryapium. 
M n ae obtuse or merely airuptly pointed at the apex: top of the 
ry woolly. 
Low shrub, 3-6 dm. tall: petals 4-8 mm. long. 3. A. spicata. — 
Tree or tall shrub: petals 10-16 mm. long. 4. A. rotundifolia. 
1. Amelanchier Canadénsis (L.) Medic. A tree, sometimes reaching the height of 
17 mm., with a trunk diameter of 6 dm. but usually lower, seldom over 8 m. high. Leaf- 
blades ovate or oval, acute or acuminate at the apex, rounded or cordate at the base, 
sharply and finely serrate, sometimes sparingly pubescent when young, soon entirely 
glabrous, 2.5-7.5 cm. long, or larger on young shoots: racemes spreading or drooping : 
edicels long, slender : bracts silky, purplish, deciduous : petals linear, linear-spatulate or 
inear-oblong, 12-18 mm. long, 3-4 times the length of the nearly or quite glabrous calyx 
and hypanthiüm : pome globose, red or purple, sweet, about 6 mm. high. 
Indry woodlands, Newfoundland to Ontario, Floridaand Louisiana. Early spring. 
. .2. Amelanchier Botryàpium (L. f.) DC. A shrub or small tree, sometimes 9 m. 
high, the foliage and inflorescence densely white-woolly when young, often nearly or quite 
glabrous when old. Leaf-blades oval, oblong, elliptic or obovate, acute at the apex, 
rounded, or sometimes narrowed or subcordate at the na finely and sharply serrate nearly 
all around: racemes short, usually rather dense: pedicels short, seldom over 2-5 em. 
